CVE-2025-34027: Versa Concerto Authentication Bypass File Write Remote Code Execution
Versa · Concerto
Affected: Versa Concerto · Exploitation: check available, not yet exploited
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 98% of scored CVEs
DescriptionCVE.org
The Versa Concerto SD-WAN orchestration platform is vulnerable to an authentication bypass in the Traefik reverse proxy configuration, allowing at attacker to access administrative endpoints. The Spack upload endpoint can be leveraged for a Time-of-Check to Time-of-Use (TOCTOU) write in combination with a race condition to achieve remote code execution via path loading manipulation, allowing an unauthenticated actor to achieve remote code execution (RCE).This issue is known to affect Concerto from 12.1.2 through 12.2.0. Additional versions may be vulnerable.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Versa · Concertofrom 12.1.2 up to and including 12.2.0
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Check available, not yet exploited. A public nuclei template can confirm it on a system you are authorised to test.
- CISA KEV
- Not listed
- Public check
- Versa Concerto API Path Based - Authentication Bypass · nuclei template in projectdiscovery/nuclei-templates
- Vendor
- Versa
- Published
- May 2025
CoverageNo articles yet
No CyberSIXT article names CVE-2025-34027 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.